/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:08:24,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:08:24,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:08:24,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:08:24,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:08:24,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:08:24,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:08:24,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:08:24,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:08:24,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:08:24,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:08:24,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:08:24,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:08:24,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:08:24,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:08:24,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:08:24,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:08:24,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:08:24,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:08:24,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:08:24,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:08:24,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:08:24,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:08:24,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:08:24,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:08:24,536 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:08:24,537 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:08:24,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:08:24,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:08:24,572 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:08:24,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:08:24,574 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:08:24,574 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:08:24,574 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:08:24,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:08:24,575 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:08:24,575 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:08:24,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:08:24,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:08:24,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:08:24,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:08:24,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:08:24,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:08:24,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:08:24,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:08:24,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:08:24,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:08:24,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:08:24,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:08:24,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:08:24,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:08:24,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:08:24,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:08:24,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:08:24,579 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:08:24,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:08:24,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:08:24,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:08:24,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 12:08:24,960 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:08:24,977 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:08:24,982 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:08:24,983 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:08:24,984 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:08:24,985 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-07-21 12:08:25,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d54ab6b6/e09b6e56fbf745d2a328a29645f4864b/FLAGefbb446aa [2020-07-21 12:08:25,703 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:08:25,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-07-21 12:08:25,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d54ab6b6/e09b6e56fbf745d2a328a29645f4864b/FLAGefbb446aa [2020-07-21 12:08:26,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d54ab6b6/e09b6e56fbf745d2a328a29645f4864b [2020-07-21 12:08:26,082 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:08:26,086 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:08:26,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:08:26,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:08:26,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:08:26,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:08:26" (1/1) ... [2020-07-21 12:08:26,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@82fd315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:26, skipping insertion in model container [2020-07-21 12:08:26,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:08:26" (1/1) ... [2020-07-21 12:08:26,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:08:26,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:08:26,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:08:26,354 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:08:26,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:08:26,399 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:08:26,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:26 WrapperNode [2020-07-21 12:08:26,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:08:26,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:08:26,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:08:26,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:08:26,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:26" (1/1) ... [2020-07-21 12:08:26,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:26" (1/1) ... [2020-07-21 12:08:26,521 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:26" (1/1) ... [2020-07-21 12:08:26,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:26" (1/1) ... [2020-07-21 12:08:26,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:26" (1/1) ... [2020-07-21 12:08:26,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:26" (1/1) ... [2020-07-21 12:08:26,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:26" (1/1) ... [2020-07-21 12:08:26,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:08:26,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:08:26,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:08:26,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:08:26,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:08:26,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:08:26,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:08:26,635 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:08:26,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 12:08:26,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:08:26,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:08:26,638 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:08:26,639 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:08:26,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 12:08:26,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:08:26,640 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:08:26,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:08:26,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:08:26,976 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:08:26,977 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 12:08:26,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:08:26 BoogieIcfgContainer [2020-07-21 12:08:26,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:08:26,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:08:26,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:08:26,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:08:26,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:08:26" (1/3) ... [2020-07-21 12:08:26,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4853cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:08:26, skipping insertion in model container [2020-07-21 12:08:26,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:08:26" (2/3) ... [2020-07-21 12:08:26,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4853cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:08:26, skipping insertion in model container [2020-07-21 12:08:26,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:08:26" (3/3) ... [2020-07-21 12:08:26,993 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt7.c [2020-07-21 12:08:27,012 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:08:27,028 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:08:27,054 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:08:27,091 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:08:27,092 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:08:27,092 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:08:27,092 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:08:27,092 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:08:27,093 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:08:27,093 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:08:27,093 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:08:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 12:08:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 12:08:27,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:08:27,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:08:27,134 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:08:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:08:27,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1473118151, now seen corresponding path program 1 times [2020-07-21 12:08:27,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:08:27,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456585696] [2020-07-21 12:08:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:08:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:08:27,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 12:08:27,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:08:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:08:27,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:08:27,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456585696] [2020-07-21 12:08:27,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:08:27,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:08:27,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898539064] [2020-07-21 12:08:27,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:08:27,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:08:27,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:08:27,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:08:27,522 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-07-21 12:08:27,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:08:27,808 INFO L93 Difference]: Finished difference Result 68 states and 99 transitions. [2020-07-21 12:08:27,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:08:27,811 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-21 12:08:27,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:08:27,824 INFO L225 Difference]: With dead ends: 68 [2020-07-21 12:08:27,824 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 12:08:27,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:08:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 12:08:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-21 12:08:27,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 12:08:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-07-21 12:08:27,884 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 14 [2020-07-21 12:08:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:08:27,884 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-07-21 12:08:27,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:08:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-07-21 12:08:27,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 12:08:27,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:08:27,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:08:28,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:08:28,088 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:08:28,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:08:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash 633537884, now seen corresponding path program 1 times [2020-07-21 12:08:28,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:08:28,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167361470] [2020-07-21 12:08:28,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:08:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:08:28,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 12:08:28,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:08:28,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:08:28,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:08:28,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:08:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:08:28,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167361470] [2020-07-21 12:08:28,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 12:08:28,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2020-07-21 12:08:28,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012660900] [2020-07-21 12:08:28,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:08:28,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:08:28,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:08:28,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:08:28,744 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 6 states. [2020-07-21 12:08:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:08:41,490 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-07-21 12:08:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:08:41,491 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-21 12:08:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:08:41,493 INFO L225 Difference]: With dead ends: 52 [2020-07-21 12:08:41,493 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 12:08:41,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 12:08:41,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 12:08:41,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-21 12:08:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 12:08:41,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-21 12:08:41,506 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2020-07-21 12:08:41,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:08:41,506 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-21 12:08:41,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:08:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-21 12:08:41,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 12:08:41,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:08:41,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:08:41,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:08:41,710 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:08:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:08:41,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1461697819, now seen corresponding path program 1 times [2020-07-21 12:08:41,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:08:41,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112286537] [2020-07-21 12:08:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:08:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:08:41,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-21 12:08:41,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:08:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:08:42,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:08:42,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:08:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 6 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 12:08:44,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112286537] [2020-07-21 12:08:44,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:08:44,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2020-07-21 12:08:44,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348318731] [2020-07-21 12:08:44,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 12:08:44,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:08:44,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 12:08:44,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2020-07-21 12:08:44,585 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 14 states. [2020-07-21 12:09:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:09:09,801 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2020-07-21 12:09:09,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 12:09:09,806 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-07-21 12:09:09,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:09:09,807 INFO L225 Difference]: With dead ends: 91 [2020-07-21 12:09:09,808 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 12:09:09,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=41, Invalid=168, Unknown=1, NotChecked=0, Total=210 [2020-07-21 12:09:09,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 12:09:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-21 12:09:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 12:09:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-07-21 12:09:09,819 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 36 [2020-07-21 12:09:09,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:09:09,819 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-07-21 12:09:09,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 12:09:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-07-21 12:09:09,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-21 12:09:09,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:09,822 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:09:10,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:10,036 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2111874945, now seen corresponding path program 1 times [2020-07-21 12:09:10,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:10,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756822365] [2020-07-21 12:09:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:09:10,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-21 12:09:10,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:09:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 12:09:10,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:09:10,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:09:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 14 times theorem prover too weak. 32 trivial. 0 not checked. [2020-07-21 12:09:13,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756822365] [2020-07-21 12:09:13,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:09:13,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 16 [2020-07-21 12:09:13,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839561917] [2020-07-21 12:09:13,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 12:09:13,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:09:13,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 12:09:13,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2020-07-21 12:09:13,607 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 16 states. [2020-07-21 12:09:43,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:09:43,245 INFO L93 Difference]: Finished difference Result 103 states and 133 transitions. [2020-07-21 12:09:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 12:09:43,245 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-07-21 12:09:43,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:09:43,247 INFO L225 Difference]: With dead ends: 103 [2020-07-21 12:09:43,248 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 12:09:43,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=48, Invalid=223, Unknown=1, NotChecked=0, Total=272 [2020-07-21 12:09:43,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 12:09:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-21 12:09:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 12:09:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-07-21 12:09:43,259 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 51 [2020-07-21 12:09:43,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:09:43,260 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-07-21 12:09:43,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 12:09:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-07-21 12:09:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-21 12:09:43,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:43,262 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:09:43,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:43,466 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:43,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1571070263, now seen corresponding path program 1 times [2020-07-21 12:09:43,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:43,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828836570] [2020-07-21 12:09:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:09:43,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-21 12:09:43,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:09:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 12:09:43,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:09:43,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:09:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 8 proven. 0 refuted. 32 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 12:09:55,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828836570] [2020-07-21 12:09:55,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:09:55,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 19 [2020-07-21 12:09:55,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730429974] [2020-07-21 12:09:55,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 12:09:55,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:09:55,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 12:09:55,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=281, Unknown=4, NotChecked=0, Total=342 [2020-07-21 12:09:55,788 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 19 states. [2020-07-21 12:10:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:10:46,355 INFO L93 Difference]: Finished difference Result 138 states and 181 transitions. [2020-07-21 12:10:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 12:10:46,355 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-07-21 12:10:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:10:46,360 INFO L225 Difference]: With dead ends: 138 [2020-07-21 12:10:46,360 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 12:10:46,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=61, Invalid=315, Unknown=4, NotChecked=0, Total=380 [2020-07-21 12:10:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 12:10:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2020-07-21 12:10:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 12:10:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 133 transitions. [2020-07-21 12:10:46,379 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 133 transitions. Word has length 61 [2020-07-21 12:10:46,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:10:46,380 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 133 transitions. [2020-07-21 12:10:46,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 12:10:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 133 transitions. [2020-07-21 12:10:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-21 12:10:46,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:10:46,383 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:10:46,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:10:46,598 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:10:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:10:46,599 INFO L82 PathProgramCache]: Analyzing trace with hash 275893766, now seen corresponding path program 1 times [2020-07-21 12:10:46,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:10:46,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026328699] [2020-07-21 12:10:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:10:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:10:46,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 43 conjunts are in the unsatisfiable core [2020-07-21 12:10:46,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:10:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 12:10:47,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:10:47,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:10:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 10 proven. 0 refuted. 28 times theorem prover too weak. 102 trivial. 0 not checked. [2020-07-21 12:10:56,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026328699] [2020-07-21 12:10:56,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:10:56,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 21 [2020-07-21 12:10:56,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128940045] [2020-07-21 12:10:56,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 12:10:56,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:10:56,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 12:10:56,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=351, Unknown=4, NotChecked=0, Total=420 [2020-07-21 12:10:56,454 INFO L87 Difference]: Start difference. First operand 108 states and 133 transitions. Second operand 21 states. [2020-07-21 12:11:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:11:34,870 INFO L93 Difference]: Finished difference Result 151 states and 195 transitions. [2020-07-21 12:11:34,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 12:11:34,871 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 73 [2020-07-21 12:11:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:11:34,872 INFO L225 Difference]: With dead ends: 151 [2020-07-21 12:11:34,873 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 12:11:34,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 115 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=69, Invalid=389, Unknown=4, NotChecked=0, Total=462 [2020-07-21 12:11:34,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 12:11:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-07-21 12:11:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-07-21 12:11:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2020-07-21 12:11:34,885 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 73 [2020-07-21 12:11:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:11:34,886 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2020-07-21 12:11:34,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 12:11:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2020-07-21 12:11:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-21 12:11:34,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:11:34,888 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:11:35,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:11:35,103 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:11:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:11:35,104 INFO L82 PathProgramCache]: Analyzing trace with hash 475455910, now seen corresponding path program 1 times [2020-07-21 12:11:35,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:11:35,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477616792] [2020-07-21 12:11:35,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:11:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:11:35,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-21 12:11:35,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:11:35,423 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 12:11:35,424 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 12:11:35,432 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-21 12:11:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 52 proven. 133 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 12:11:35,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:11:35,578 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:11:35,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:11:35,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477616792] [2020-07-21 12:11:35,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 12:11:35,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-21 12:11:35,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743856331] [2020-07-21 12:11:35,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 12:11:35,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:11:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 12:11:35,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-07-21 12:11:35,668 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand 13 states. [2020-07-21 12:11:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:11:36,091 INFO L93 Difference]: Finished difference Result 130 states and 158 transitions. [2020-07-21 12:11:36,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 12:11:36,092 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2020-07-21 12:11:36,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:11:36,094 INFO L225 Difference]: With dead ends: 130 [2020-07-21 12:11:36,095 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 12:11:36,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:11:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 12:11:36,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-07-21 12:11:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-21 12:11:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2020-07-21 12:11:36,126 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 91 [2020-07-21 12:11:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:11:36,129 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2020-07-21 12:11:36,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 12:11:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2020-07-21 12:11:36,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-07-21 12:11:36,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:11:36,131 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 7, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:11:36,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:11:36,348 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:11:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:11:36,349 INFO L82 PathProgramCache]: Analyzing trace with hash 459763085, now seen corresponding path program 2 times [2020-07-21 12:11:36,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:11:36,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172870419] [2020-07-21 12:11:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:11:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:11:36,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 55 conjunts are in the unsatisfiable core [2020-07-21 12:11:36,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:11:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 16 proven. 185 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-21 12:11:37,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:11:37,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:11:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 54 proven. 0 refuted. 28 times theorem prover too weak. 231 trivial. 0 not checked. [2020-07-21 12:11:57,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172870419] [2020-07-21 12:11:57,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:11:57,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10] total 29 [2020-07-21 12:11:57,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174286740] [2020-07-21 12:11:57,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 12:11:57,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:11:57,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 12:11:57,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=688, Unknown=9, NotChecked=0, Total=812 [2020-07-21 12:11:57,227 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 29 states. [2020-07-21 12:12:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:12:49,317 INFO L93 Difference]: Finished difference Result 141 states and 176 transitions. [2020-07-21 12:12:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 12:12:49,318 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 99 [2020-07-21 12:12:49,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:12:49,320 INFO L225 Difference]: With dead ends: 141 [2020-07-21 12:12:49,320 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 12:12:49,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 155 SyntacticMatches, 18 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=119, Invalid=742, Unknown=9, NotChecked=0, Total=870 [2020-07-21 12:12:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 12:12:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 12:12:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 12:12:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 12:12:49,323 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 99 [2020-07-21 12:12:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:12:49,323 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 12:12:49,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 12:12:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 12:12:49,323 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 12:12:49,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:12:49,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 12:12:49,735 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-07-21 12:12:49,909 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 16 [2020-07-21 12:12:54,111 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 86 DAG size of output: 14 [2020-07-21 12:12:54,113 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:12:54,113 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:12:54,113 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:12:54,114 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:12:54,114 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 12:12:54,114 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:12:54,114 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:12:54,114 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-21 12:12:54,114 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-21 12:12:54,114 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-21 12:12:54,114 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-21 12:12:54,115 INFO L268 CegarLoopResult]: For program point L31(lines 31 34) no Hoare annotation was computed. [2020-07-21 12:12:54,115 INFO L268 CegarLoopResult]: For program point L29(lines 29 34) no Hoare annotation was computed. [2020-07-21 12:12:54,115 INFO L268 CegarLoopResult]: For program point L31-2(lines 21 34) no Hoare annotation was computed. [2020-07-21 12:12:54,115 INFO L268 CegarLoopResult]: For program point L27(lines 27 34) no Hoare annotation was computed. [2020-07-21 12:12:54,115 INFO L268 CegarLoopResult]: For program point L25(lines 25 34) no Hoare annotation was computed. [2020-07-21 12:12:54,115 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 39) no Hoare annotation was computed. [2020-07-21 12:12:54,116 INFO L268 CegarLoopResult]: For program point L23(lines 23 34) no Hoare annotation was computed. [2020-07-21 12:12:54,116 INFO L268 CegarLoopResult]: For program point L21(lines 21 34) no Hoare annotation was computed. [2020-07-21 12:12:54,116 INFO L268 CegarLoopResult]: For program point L19-2(lines 19 37) no Hoare annotation was computed. [2020-07-21 12:12:54,116 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 39) no Hoare annotation was computed. [2020-07-21 12:12:54,117 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (= (mod (+ main_~i~0 main_~j~0 main_~k~0 main_~v1~0 main_~v2~0 main_~v3~0 main_~v4~0) 4294967296) (mod main_~l~0 4294967296)) [2020-07-21 12:12:54,117 INFO L264 CegarLoopResult]: At program point L36-1(lines 19 37) the Hoare annotation is: (= (mod (+ main_~i~0 main_~j~0 main_~k~0 main_~v1~0 main_~v2~0 main_~v3~0 main_~v4~0 1) 4294967296) (mod (+ main_~l~0 1) 4294967296)) [2020-07-21 12:12:54,118 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 39) the Hoare annotation is: true [2020-07-21 12:12:54,118 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-21 12:12:54,118 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-21 12:12:54,119 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-21 12:12:54,119 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-21 12:12:54,119 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-21 12:12:54,119 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-21 12:12:54,119 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-21 12:12:54,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:12:54 BoogieIcfgContainer [2020-07-21 12:12:54,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:12:54,138 INFO L168 Benchmark]: Toolchain (without parser) took 268054.94 ms. Allocated memory was 135.8 MB in the beginning and 270.5 MB in the end (delta: 134.7 MB). Free memory was 100.3 MB in the beginning and 153.4 MB in the end (delta: -53.1 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. [2020-07-21 12:12:54,139 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 12:12:54,140 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.13 ms. Allocated memory is still 135.8 MB. Free memory was 99.9 MB in the beginning and 89.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 12:12:54,141 INFO L168 Benchmark]: Boogie Preprocessor took 152.79 ms. Allocated memory was 135.8 MB in the beginning and 200.8 MB in the end (delta: 65.0 MB). Free memory was 89.9 MB in the beginning and 178.8 MB in the end (delta: -88.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-21 12:12:54,142 INFO L168 Benchmark]: RCFGBuilder took 428.69 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 163.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-07-21 12:12:54,143 INFO L168 Benchmark]: TraceAbstraction took 267152.54 ms. Allocated memory was 200.8 MB in the beginning and 270.5 MB in the end (delta: 69.7 MB). Free memory was 162.4 MB in the beginning and 153.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 78.7 MB. Max. memory is 7.1 GB. [2020-07-21 12:12:54,147 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 135.8 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 313.13 ms. Allocated memory is still 135.8 MB. Free memory was 99.9 MB in the beginning and 89.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 152.79 ms. Allocated memory was 135.8 MB in the beginning and 200.8 MB in the end (delta: 65.0 MB). Free memory was 89.9 MB in the beginning and 178.8 MB in the end (delta: -88.9 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 428.69 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 163.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 267152.54 ms. Allocated memory was 200.8 MB in the beginning and 270.5 MB in the end (delta: 69.7 MB). Free memory was 162.4 MB in the beginning and 153.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 78.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (i + j + k + v1 + v2 + v3 + v4 + 1) % 4294967296 == (l + 1) % 4294967296 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 262.4s, OverallIterations: 8, TraceHistogramMax: 9, AutomataDifference: 209.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 163 SDtfs, 138 SDslu, 1393 SDs, 0 SdLazy, 3461 SolverSat, 77 SolverUnsat, 98 SolverUnknown, 0 SolverNotchecked, 201.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 816 GetRequests, 630 SyntacticMatches, 61 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 50.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 33 PreInvPairs, 58 NumberOfFragments, 36 HoareAnnotationTreeSize, 33 FomulaSimplifications, 122 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 7 FomulaSimplificationsInter, 701 FormulaSimplificationTreeSizeReductionInter, 4.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 50.5s InterpolantComputationTime, 452 NumberOfCodeBlocks, 452 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 785 ConstructedInterpolants, 0 QuantifiedInterpolants, 663962 SizeOfPredicates, 23 NumberOfNonLiveVariables, 981 ConjunctsInSsa, 287 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 869/1493 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...